<!DOCTYPE html>
<html>
<head>
    <title>站点隔离:demo</title>
    <style>
        iframe {
            width: 800px;
            height: 300px;
        }
    </style>
</head>
<body>
    <div><iframe src="iframe.html"></iframe></div>
    <div><iframe src="https://www.infoq.cn/"></iframe></div>
    <div><iframe src="https://time.geekbang.org/"></iframe></div>
    <div><iframe src="https://www.geekbang.org/"></iframe></div>
</body>
</html>
</html>